Chemical Name: (3aR,5S,8aR,9aR)-3a,5,6,7,8,8a,9,9a-Octahydro-5,8a-dimethyl-3-methylene-NAphtho[2,3-b]furan-2(3H)-one; Alantolactone
Synonym: Helenin; (+)-Alantolactone; Alant Camphor; Elecampane Camphor; Eupatal; Inula Camphor;
Smile: O=C(O[C@H]1[C@@H]2C=C3[C@@H](C)CCC[C@]3(C)C1)C2=C